View Compilation Error

0_0_38622357_15427.cpp: In function 'int main()':
0_0_38622357_15427.cpp:40:4: error: 'memset' was not declared in this scope
    memset(f, 0, sizeof(f));
    ^~~~~~
0_0_38622357_15427.cpp:40:4: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
0_0_38622357_15427.cpp:2:1:
+#include <cstring>
 using namespace std;
0_0_38622357_15427.cpp:40:4:
    memset(f, 0, sizeof(f));
    ^~~~~~